WO1993008495A1 - Optical fiber ribbon cable and assembly thereof with a connector - Google Patents
Optical fiber ribbon cable and assembly thereof with a connector Download PDFInfo
- Publication number
- WO1993008495A1 WO1993008495A1 PCT/US1992/009022 US9209022W WO9308495A1 WO 1993008495 A1 WO1993008495 A1 WO 1993008495A1 US 9209022 W US9209022 W US 9209022W WO 9308495 A1 WO9308495 A1 WO 9308495A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cable
- optical fiber
- optical fibers
- optical
- fibers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/448—Ribbon cables
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4403—Optical cables with ribbon structure
Definitions
- the invention pertains to optical fiber ribbon cables having precisely aligned and oriented optical fibers therein for termination to a connector having close tolerance termination requirements.
- the invention provides optical fiber ribbon cables having precisely spaced optical fibers which can meet the dimensional tolerances required for termination to such connectors.
- the invention comprises an optical fiber ribbon cable in which a multiplicity of optical fibers are cabled together within a jacket of dielectric material at precise distances apart, there being at least one optical fiber width space between an edge fiber and the next adjacent fiber, preferably two fiber widths space therebetween.
- the first optical fiber from the edge of cable is positioned in a location within the cable such that the other optical fibers can be easily and precisely positioned in the cable with reference to the first fiber.
- the cable with the aid of one or two, upper and/or lower, guide pieces can track the groove into a connector to position the cable correctly and precisely in the connector for termination of the individual optical fibers.
- the guide pieces are in the form of small flat molded polymer pieces of about the width of the cable which have a protruberance or ridge molded accurately into one side to exactly match the groove in the cable between the first and second optical fibers.
- One or two guide pieces are laid on the top and/or bottom of the cable end and together the guide pieces and cable inserted as a unit into an optical fiber connector.
- optical fiber ribon cables of the invention are manufactured by standard cabling techniques used in the cabling art.
- the optical fibers used therein are those known to be useful in the art, made of glass or plastic, coated or uncoated, and covered or not covered by buffering layers of soft or hard materials.
- a high-temperature embodiment of the cable may be formed of sheets of unsintered PTFE or unsintered expanded PTFE around the optical fibers and the PTFE sintered at the end of the cabling process.
- the sheathing of the cable which holds the optical fibers in position precisely spaced apart from each other may be porous expanded polytetrafluoroethylene (PTFE) coated with a thermoplastic polyester to seal and hold the PTFE layers together at the edges of the cable or in between the optical fibers in the form of webs between the fibers.
- PTFE polytetrafluoroethylene
- the expanded PTFE useful in the invention is that disclosed in U.S. patents 3,953,566, 3,962,153, 4,096,227 and 4,187,390.
- Other equivalent materials of similar insulation properties to the above preferred PTFE materials may also be utilized.
- the guide pieces may be any commonly useful oldable thermoplastic insulation material or thermosetting insulation material if needed for a high-temperature resistant cable.
- Figure 1 is a partial cross-sectional perspective vi ew of a cable of the invention.
- Figure 2 is a cross-sectional perspective view of a cable of the invention having the optical fibers therein separated by webs of insulation.
- Figure 3 i s an exploded partial cross-sectional view of an assembly of the cable of the invention with a guide piece and a connector.
- Figure 1 shows a partial perspective view of a portion of ⁇ ribbon cable 13 of the invention in which one optical fiber 1 near an edge of ribbon cable 13 is separated by web 7 within the polymeric insulation 4 by at least one fiber diameter, preferably at least two fiber diameters from the second or next adjacent optical fiber 2.
- Cable 13 is manufactured by well-known cabling methods used in cabling electric signal conductors and fiber optic cables together into flat ribbon cables.
- insulation 4 is preferably made from sheets of the porous expanded PTFE described above which have on one surface an adhesive layer of thermoplastic polyester for easy adherance of two layers of expanded PTFE to each other around the optical fibers 3 of the cable in the cabling process. This method allows close dimensional control of the spacing of the optical fibers within the cable during and after the process.
- the insulation may be sheets of PTFE insulation extruded from emulsion prepared fine PTFE powder particles which are placed around the optical fibers by the cabling process and the resulting ribbon cable heated in a salt bath or sintering oven for the requisite time at a temperature to fully sinter the PTFE to full-density PTFE insulation.
- optical fiber 1 is carefully spaced at preferably two opti cal fi ber diameters from the second or next adjacent opti cal fi ber 2 so that the spaci ng of fi ber 2 and the remaining optical fibers 3 such that a known spacing between fibers 1 , 2., and 3 i s achi eved and mai ntai ned withi n the cabl e with fiber 1 being the reference fiber for that spacing.
- Such carefully controlled spacing between optical fibers is necessary to match the termination grooves of more modern optical fiber connectors for accurate termination to those connectors.
- the second and third grooves of the connector remain empty to correspond to the gap of controlled size between fibes 1 and 2 of cable H.
- a guide piece 8. is placed either above or below or both above and below the end of cable J_3.
- the guide piece 8. is relatively short and corresponds to the length of cable which is to be inserted in connector H as shown in Figure 3.
- the grooves 12 in connector H aid in maintaining the spacing in the connector of the optical fibers of the cable.
- a protruding portion 9 . of guide piece 8 . fits down into web 7 when guide piece 8 . is placed in abutment with cable H for insertion into connector 1L
- a cover (not shown) fits over cable 13 and guide piece 8 to hold them in the completely assembled connector.
- the cable H and guide piece 8 when fully assembled to connector TJ. form an assembly of the invention.
- the guide piece may be manufactured from any moldable plastic dielectric material, usually a thermoplastic polymer being preferred for convenience and ease of manufacture.
- the cable 13, the guide piece 8. provide a simple easy to assemble means to overcome the spacing problems and supply the needs for accuracy and predictability of dimensions for assembly of optical fiber cables to modern connectors having close dimensional tolerances.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
An optical fiber ribbon cable having a specified space between the first and second optical fibers, a guide piece to fit onto the cable against the web of jacket between the first two optical fibers, and an assembly of the cable and guide piece with an optical fiber connector.
Description
TITLE OF INVENTION
OPTICAL FIBER RIBBON CABLE AND ASSEMBLY THEREOF WITH A CONNECTOR
FIELD OF THE INVENTION
The invention pertains to optical fiber ribbon cables having precisely aligned and oriented optical fibers therein for termination to a connector having close tolerance termination requirements.
BACKGROUND OF THE INVENTION
In the field of optical fiber cables, the mating thereof to very precise connectors having very close dimensional tolerances renders it increasingly difficult to manufacture optical fiber cables to the dimensional precision required for termination to those connectors. The invention provides optical fiber ribbon cables having precisely spaced optical fibers which can meet the dimensional tolerances required for termination to such connectors.
SUMMARY OF THE INVENTION
The invention comprises an optical fiber ribbon cable in which a multiplicity of optical fibers are cabled together within a jacket of dielectric material at precise distances apart, there being at least one optical fiber width space between an edge fiber and the next adjacent fiber, preferably two fiber widths space therebetween. The first optical fiber from the edge of cable is positioned in a location within the cable such that the other optical fibers can be easily and precisely positioned in the cable with reference to the first fiber.
By separating the first and second optical fibers from each other by at least one and preferably two center-to-center spacing units (such as 0.01 inch per unit), in the form of a groove, the cable with the aid of one or two, upper and/or lower, guide pieces can track the groove into a connector to position the cable correctly and precisely in the connector for termination of the individual optical fibers.
The guide pieces are in the form of small flat molded polymer pieces of about the width of the cable which have a protruberance or ridge molded accurately into one side to exactly match the groove in the cable between the first and second optical fibers. One or two guide pieces are laid on the top and/or bottom of the cable end and together the guide pieces and cable inserted as a unit into an optical fiber connector.
The optical fiber ribon cables of the invention are manufactured by standard cabling techniques used in the cabling art. The optical fibers used therein are those known to be useful in the art, made of glass or plastic, coated or uncoated, and covered or not covered by buffering layers of soft or hard materials. A high-temperature embodiment of the cable may be formed of sheets of unsintered PTFE or unsintered expanded PTFE around the optical fibers and the PTFE sintered at the end of the cabling process. The sheathing of the cable which holds the optical fibers in position precisely spaced apart from each other may be porous expanded polytetrafluoroethylene (PTFE) coated with a thermoplastic polyester to seal and hold the PTFE layers together at the edges of the cable or in between the optical fibers in the form of webs between the fibers. The expanded PTFE useful in the invention is that disclosed in U.S. patents 3,953,566, 3,962,153, 4,096,227 and 4,187,390. Other equivalent materials of similar insulation properties to the above preferred PTFE materials may also be utilized. The guide pieces may be any commonly useful oldable thermoplastic insulation material or thermosetting insulation material if needed for a high-temperature resistant cable.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a partial cross-sectional perspective vi ew of a cable of the invention.
Figure 2 is a cross-sectional perspective view of a cable of the invention having the optical fibers therein separated by webs of insulation.
Figure 3 i s an exploded partial cross-sectional view of an assembly of the cable of the invention with a guide piece and a connector.
DETAILED DESCRIPTION OF THE INVENTION
The invention is now described, but not limited, by reference to the drawings to more carefully delineate the scope of the f invention which will be described by the appended claims.
Figure 1 shows a partial perspective view of a portion of ^ ribbon cable 13 of the invention in which one optical fiber 1 near an edge of ribbon cable 13 is separated by web 7 within the polymeric insulation 4 by at least one fiber diameter, preferably at least two fiber diameters from the second or next adjacent optical fiber 2. The remaining optical fibers 3 of ribbon cable
13 may be adjacent each other without intervening webs of insulation. As shown in Figure 2, there may be intervening webs
14 of insulation separating the optical fibers 2 and 3 from each other at carefully controlled distances apart. Web 7 of insulation separates and holds in place optical fibers 1 and 2 at the specified one or two fiber width distance apart.
Cable 13 is manufactured by well-known cabling methods used in cabling electric signal conductors and fiber optic cables together into flat ribbon cables. In this invention, insulation 4 is preferably made from sheets of the porous expanded PTFE described above which have on one surface an adhesive layer of thermoplastic polyester for easy adherance of two layers of expanded PTFE to each other around the optical fibers 3 of the cable in the cabling process. This method allows close dimensional control of the spacing of the optical fibers within the cable during and after the process.
Where a high temperature cable is being made, the insulation may be sheets of PTFE insulation extruded from emulsion prepared fine PTFE powder particles which are placed around the optical fibers by the cabling process and the resulting ribbon cable heated in a salt bath or sintering oven for the requisite time at a temperature to fully sinter the PTFE to full-density PTFE insulation.
In the cabling process, optical fiber 1 is carefully spaced at preferably two opti cal fi ber diameters from the second or next adjacent opti cal fi ber 2 so that the spaci ng of fi ber 2 and the remaining optical fibers 3 such that a known spacing between fibers 1 , 2., and 3 i s achi eved and mai ntai ned withi n the cabl e
with fiber 1 being the reference fiber for that spacing. Such carefully controlled spacing between optical fibers is necessary to match the termination grooves of more modern optical fiber connectors for accurate termination to those connectors. As shown in Figure 3, the second and third grooves of the connector remain empty to correspond to the gap of controlled size between fibes 1 and 2 of cable H.
To aid in maintaining the required spacing while cable termination is being performed, a guide piece 8. is placed either above or below or both above and below the end of cable J_3. The guide piece 8. is relatively short and corresponds to the length of cable which is to be inserted in connector H as shown in Figure 3. The grooves 12 in connector H aid in maintaining the spacing in the connector of the optical fibers of the cable. A protruding portion 9. of guide piece 8. fits down into web 7 when guide piece 8. is placed in abutment with cable H for insertion into connector 1L A cover (not shown) fits over cable 13 and guide piece 8 to hold them in the completely assembled connector. The cable H and guide piece 8 when fully assembled to connector TJ. form an assembly of the invention. The guide piece may be manufactured from any moldable plastic dielectric material, usually a thermoplastic polymer being preferred for convenience and ease of manufacture.
The cable 13, the guide piece 8. provide a simple easy to assemble means to overcome the spacing problems and supply the needs for accuracy and predictability of dimensions for assembly of optical fiber cables to modern connectors having close dimensional tolerances.
Claims
1. An optical fiber ribbon cable comprising:
(a) a multiplicity of optical fibers cabled together at precise distances apart within
(b) a jacket of dielectric material;
(c) the first optical fiber adjacent an edge of said cable being spaced at least one optical fiber diameter, preferably two optical fiber diameters, from the next adjacent optical fiber of the cable; and
(d) the next adjacent and remaining optical fibers of said cable being positioned a known and predictable distance from said first optical fiber as referenced by a web formed from said dielectric material of said jacket.
2. A cable of Claim 1 wherein said jacket material comprises polytetraf1uoroethy1ene.
3. A cable of Claim 2 wherein said polytetrafluoroethylene comprises expanded polytetrafluoroethylene.
4. A cable of Claim 1 wherein said optical fibers are coated with protective layers.
5. A cable of Claim 3 wherein said jacket material comprises two sheets of expanded polytetrafluoroethylene, having an adhesive coating thereon, which are bonded together around said optical fibers.
6. A cable of Claim 5 wherein said adhesive comprises thermoplastic polyester.
7. An assembly of a cable of Claims 1, 2, 3, 4, 5, or 6 terminated to:
(a) a molded dielectric polymer guide piece configured on one side to fit into the space between said first and said adjacent optical fibers against said web of insulation linking said fibers; and
(b) an optical fiber ribbon cable connector.
8. A molded dielectric polymer guide piece comprising a flat elongated narrow body configured to be flat on a top side and on its opposite side having a protruding ridge across said piece aligned to fit against a web between two adjacent jacketed optical fibers of a flat ribbon cable comprising a multiplicity of optical fibers cabled together.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US782,224 | 1991-10-24 | ||
| US07/782,224 US5208889A (en) | 1991-10-24 | 1991-10-24 | Optical fiber ribbon cable and assembly thereof with a connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993008495A1 true WO1993008495A1 (en) | 1993-04-29 |
Family
ID=25125399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1992/009022 Ceased WO1993008495A1 (en) | 1991-10-24 | 1992-10-21 | Optical fiber ribbon cable and assembly thereof with a connector |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5208889A (en) |
| WO (1) | WO1993008495A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2328758A (en) * | 1997-08-27 | 1999-03-03 | Samsung Electronics Co Ltd | Optical fibre array having input and output arrays on one substrate |
| JP2001512580A (en) * | 1997-02-18 | 2001-08-21 | テレフオンアクチーボラゲツト エル エム エリクソン（パブル） | Optical fiber flex foil lamination method |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5412749A (en) * | 1993-10-26 | 1995-05-02 | W. L. Gore & Associates, Inc. | Dual fiber optic illumination bundle |
| US5611017A (en) * | 1995-06-01 | 1997-03-11 | Minnesota Mining And Manufacturing Co. | Fiber optic ribbon cable with pre-installed locations for subsequent connectorization |
| US5574817A (en) * | 1995-06-01 | 1996-11-12 | Minnesota Mining And Manufacturing Company | Fiber optic ribbon cable assembly and method of manufacturing same |
| KR0171384B1 (en) * | 1995-11-09 | 1999-05-01 | 양승택 | Multi-core Optical Connector for Ribbon Optical Cable |
| US6805493B2 (en) | 1996-03-12 | 2004-10-19 | 3M Innovative Properties Company | Optical connector assembly using partial large diameter alignment features |
| US5727097A (en) * | 1996-06-07 | 1998-03-10 | Minnesota Mining And Manufacturing Company | Pull-proof fiber optic array connector |
| US5790733A (en) * | 1996-06-07 | 1998-08-04 | Minnesota Mining And Manufactouring Company | Optoelectronic device receptacle and method of making same |
| US6487347B2 (en) | 1997-03-24 | 2002-11-26 | Corning Cable Systems Llc | Indoor/outdoor optical cables |
| US5966489A (en) * | 1997-06-30 | 1999-10-12 | Siecor Corporation | Fiber optic ribbon interconnect cable |
| US6381390B1 (en) | 1999-04-06 | 2002-04-30 | Alcatel | Color-coded optical fiber ribbon and die for making the same |
| US6442318B1 (en) | 1999-11-23 | 2002-08-27 | Schott Fiber Optics, Inc. | Prefabricated optical fiber ribbon cable for connectorizing with a terminal connector and methods of connectorizing and fabricating the same |
| US6583902B1 (en) | 1999-12-09 | 2003-06-24 | Alvesta, Inc. | Modular fiber-optic transceiver |
| ATE314670T1 (en) | 2001-07-26 | 2006-01-15 | Draka Comteq Bv | OPTICAL FIBER RIBBON |
| US6853783B2 (en) * | 2003-02-28 | 2005-02-08 | Corning Cable Systems Llc | Optical Fiber Ribbons Having Preferential Tear Portions |
| US7039282B2 (en) * | 2004-06-30 | 2006-05-02 | Corning Cable Systems Llc | Optical fiber array with an intermittent profile and method for manufacturing the same |
| US7848604B2 (en) * | 2007-08-31 | 2010-12-07 | Tensolite, Llc | Fiber-optic cable and method of manufacture |
| GB2474998B (en) * | 2008-08-26 | 2012-03-21 | Nyce Networks Inc | Optical fiber connector with integrated cable splitting |
| MX2013002600A (en) * | 2010-09-08 | 2013-04-24 | Schlumberger Technology Bv | COMPONENTS OF CABLES AND METHODS OF MANUFACTURE AND USE OF THE SAME. |
| US9052486B2 (en) | 2010-10-21 | 2015-06-09 | Carlisle Interconnect Technologies, Inc. | Fiber optic cable and method of manufacture |
| JP6782090B2 (en) * | 2016-04-20 | 2020-11-11 | 古河電気工業株式会社 | Optical fiber cord, optical fiber cord laying method |
| US10185089B2 (en) * | 2016-09-15 | 2019-01-22 | Ofs Fitel, Llc | Splicing optical fiber cable using a mass fusion splicer having a pitch different from cable pitch |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4776664A (en) * | 1987-08-20 | 1988-10-11 | Masahiko Okura | Optical telephone wire |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3920432A (en) * | 1974-08-30 | 1975-11-18 | Bell Telephone Labor Inc | Method of fabricating an optical fiber ribbon |
| DE3020622C2 (en) * | 1980-05-30 | 1985-05-15 | W.L. Gore & Associates, Inc., Newark, Del. | Ribbon cable and process for its manufacture |
| GB8416000D0 (en) * | 1984-06-22 | 1984-07-25 | Bicc Plc | Optical fibre ribbon structure |
| DE3606617A1 (en) * | 1986-02-28 | 1987-09-03 | Siemens Ag | FLAT TAPE LINE WITH SEVERAL LIGHTWAVE CORE AND METHOD FOR THE PRODUCTION THEREOF |
| DE3624124A1 (en) * | 1986-07-17 | 1988-01-21 | Kabelmetal Electro Gmbh | MESSAGE CABLES WITH FOCUS |
| DE3706323A1 (en) * | 1987-02-27 | 1988-09-08 | Kabelmetal Electro Gmbh | TAPE LINE WITH FOCUS |
| US4900126A (en) * | 1988-06-30 | 1990-02-13 | American Telephone & Telegraph Co. | Bonded array of transmission media |
-
1991
- 1991-10-24 US US07/782,224 patent/US5208889A/en not_active Expired - Lifetime
-
1992
- 1992-10-21 WO PCT/US1992/009022 patent/WO1993008495A1/en not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4776664A (en) * | 1987-08-20 | 1988-10-11 | Masahiko Okura | Optical telephone wire |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 01, no. 5046 4 February 1991 * |
| PATENT ABSTRACTS OF JAPAN vol. 11, no. 178 (P-584)(2625) 9 June 1987 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001512580A (en) * | 1997-02-18 | 2001-08-21 | テレフオンアクチーボラゲツト エル エム エリクソン（パブル） | Optical fiber flex foil lamination method |
| EP0970399B1 (en) * | 1997-02-18 | 2010-09-29 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Lamination of optical fiber flexfoils |
| GB2328758A (en) * | 1997-08-27 | 1999-03-03 | Samsung Electronics Co Ltd | Optical fibre array having input and output arrays on one substrate |
| GB2328758B (en) * | 1997-08-27 | 2000-07-26 | Samsung Electronics Co Ltd | Optical fiber array module having input and output optical fiber array on one planar substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| US5208889A (en) | 1993-05-04 |
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